1999/05 about Life in the northeastern state of Maranhão, Brazil
1997/98 about Life in the Swiss Canton of Thurgau
1991/93 about Life in the 'Zona Norte e Baixada Fluminense' Rio de Janeiro,
Brazil
1989 about Life in South West China, Macão, Shanghai and Beijing
1980/87 about the inhabitants of Alcântara do Maranhão, Brazil